Citations
Documents relating to the story that I-Hsing [一行 / Yi Xing] made the first observation of magnetic declination about 720 A.D., 1960 - 1968, GBR/1928/NRI/SCC2/95/4. Needham Research Institute. |
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Documents relating to the story that I-Hsing [一行 / Yi Xing] made the first observation of magnetic declination about 720 A.D., 1960 - 1968, GBR/1928/NRI/SCC2/95/4. Needham Research Institute. https://archivesearch.lib.cam.ac.uk/repositories/21/archival_objects/334221 Accessed July 06, 2024. |